Structural, magnetic and electrochemical characterizations of Bi2Mo2O9 nanoparticle for supercapacitor application

Abstract In this present work, bismuth molybdate (Bi 2 Mo 2 O 9 ) nanoparticles (NPs) were prepared by microwave combustion method using urea as the fuel. The phase formation and purity of the product was identified by powder X-ray diffraction (XRD). Fourier transform-infrared (FT-IR) analysis was adopted to record the functional group of Bi 2 Mo 2 O 9 NPs. The morphology, purity, size and elemental composition of the sample were confirmed by Scanning electron microscope (SEM), elemental mapping, energy dispersive X-ray (EDX) analysis and High-Resolution transmission electron microscope (HR-TEM) technique respectively. The UV–visible and photoluminescence (PL) spectra were used to examine optical and electronic behavior of the prepared sample at room temperature (RT). The chemical bonding of Bi 2 Mo 2 O 9 NPs was studied by Raman spectroscopy. The magnetic properties of Bi 2 Mo 2 O 9 NPs were examined by vibrating sample magnetometer (VSM) at RT. The particle size distribution was examined by X-ray Photoelectron spectroscopy (XPS). The Electrochemical (EC) properties of Bi 2 Mo 2 O 9 NPs were investigated by Cyclic voltammetry (CV), Galvanostatic charge/discharge (GCD) and Electrochemical impedance spectral (EIS) studies. The specific capacitance ( C s ) of prepared Bi 2 Mo 2 O 9 NPs is 197 F/g at 0.4 A/g with excellent cycle stability of 94% specific capacitance after 1000 cycles. Hence, the results of electrochemical characteristics exhibits excellent performance and have potential application of electrode for energy storage systems.